vga_setmousesupport man page

Set mouse support; 0 disables (default), 1 enabled. If enabled, the mouse is set up for screen resolution after a mode set and you can use the various mouse_ functions. You can also use mouse_init(3) the mouse in more flexibility. However, usually this is not the deal of the application. The mouse is configured in /etc/vga/libvga.config and usually the application will just want to use that.